The law would allow workers to take either Saturday or Sunday off as a day of worship.

worship 是名词，意思是"礼拜、崇拜"，指宗教仪式中对神灵的敬拜活动。这个词由词根 worth（价值）和后缀 -ship（状态、性质）组成，字面意思是"值得尊敬的状态"，引申为宗教崇拜活动。